Disc protection casing and drive for receiving the same

ABSTRACT

The disc protection casing includes a disc protection casing body having a disc receiving space therein. A disc holder, insertable into the interior of the disc protection casing body, has an elastic member formed at one end of the same for supporting a disc. When the disc holder is inserted into the casing body, a shoulder on the elastic member contacts a guide member in the casing body and the elastic member releases a disc supported thereby.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a disc protection casing and a drive for receiving the same.

2. Description of the Background Art

Types of a disc are classified into a reproducing-only type such as a CD-ROM, a DVD-ROM, etc., and a recordable type such as a WORM(Write Once Read Many) type, a rewritable type, etc. in accordance with the number of the data writing operations.

The writable-type disc is generally placed in a disc protection casing such as a cartridge, to protect the disc from external contamination or damage.

It is required that the disc casing is designed to be opened when changing the disc.

Namely, when using a small size cartridge in a large size driving apparatus, since the small size cartridge does not have a certain size opening for the large size driving apparatus, the small size cartridge having a disc therein may not be used for the large size driving apparatus. Recently, a new cartridge capable of changing the disc inserted in the casing has been introduced in order to overcome the above-described problems.

As shown in FIG. 1, the cartridge includes a cartridge body 2 for receiving a disc 1 therein, and a disc holder 6 which may be detachably inserted via one edge of the cartridge body 2.

An opening(not shown) is formed in the bottom of the cartridge body 2, so that a pick-up unit of a drive can access the disc 1, and the opening is closed and opened by a shutter 4.

A receiving portion 5 is formed in the one edge of the cartridge body 2, so that the disc 1 may be inserted into the interior of the cartridge body 2.

In the thusly constituted conventional disc cartridge, when a user wishes to insert a bare state disc(the disc is separated from the cartridge body 2) into the cartridge body 2, the user holds a certain portion of a non-recorded surface of the disc 1 to prevent the data recorded surface from being contaminated and inserts the disc 1 into the receiving portion 5 of the cartridge body 2 and then inserts the disc holder 6 into the receiving port 5.

On the contrary, in a state that a disc 1 is already inserted in the interior of the cartridge body 2, in order to use a bare state disc 1, for removing the disc 1 from the cartridge body 2, the disc holder 6 is detached from the cartridge body 2, and the disc 1 falls down by gravity due to the weight of the disc through the receiving port 5 when the cartridge is held upright by the user.

However, in the conventional disc cartridge, in order to insert the disc into the interior of the cartridge body or remove the disc from the cartridge body, the user holds the disc and inserts the disc into the cartridge body or holds the disc falling from the cartridge body by the weight of the disc. In this case, the data recorded surface of the disc may be contaminated by pollutants or the like. Therefore, the disc must be very carefully handled.

As a very high capacity and high speed disc is introduced, if the disc is contaminated by pollutants and the like, it is impossible to reproduce the data recorded on the CD or a data reproducing error may occur.

In addition, discs are further classified into a disc having one recordable surface(hereinafter called a single sided disc) and a disc having two recordable surfaces(hereinafter called a double sided disc).

The single sided disc includes a recordable surface for recording and reproducing data and a label surface for attaching a label thereon, and the double sided disc includes only two recordable surfaces.

In the case of the single sided disc, the data recording surface is opposite to the optical pick-up unit, and in the case of the double sided disc, one or both recordable surfaces of the double side disc may be opposite to the optical pick-up unit for thereby recording and reproducing the data. In the above-described structure, the disc holder 6 is inserted into the cartridge body 2 in a certain direction.

In the case of the single sided disc, the disc must be inserted in one direction, and in the case of the double sided disc, the surface to be recorded or reproduced must be inserted in a certain orientation.

However, when a user re-inserts a bare state single sided disc into the disc cartridge, since the conventional disc holder and the cartridge body are symmetrical, the user may erroneously insert the disc holder into the cartridge body, so that the insertion direction of the disc may be changed.

In particular, in the case of the single sided disc, even when the cartridge body and the disc holder are normally inserted, if the label surface of the disc is opposite to the optical pick-up unit, the optical pick-up unit can not access the disc.

Namely, when the disc is properly inserted into the cartridge body, and the disc holder is properly inserted thereinto, the disc is normally recorded and reproduced. Therefore, the user must carefully insert the disc into the disc cartridge, so that in the conventional art, there is much inconvenience to use the disc.

SUMMARY OF THE INVENTION

Accordingly, it is an object of the present invention to provide a disc protection casing and a drive for receiving the same which are capable of preventing a data recording surface of a disc from being contaminated when inserting and removing a disc.

It is another object of the present invention to provide a disc protection casing and a drive for receiving the same which are capable of easily separating a disc from a disc protection casing.

To achieve the above objects, there is provided a disc protection casing according to the present invention which includes a disc protection casing body having a disc receiving space therein, and a disc holder insertable into the interior of the disc protection casing body and having an elastic member formed at one end of the same for supporting the disc.

To achieve the above objects, there is also provided a disc holder according to the present invention which includes an elastic member engaged with a certain portion thereof for elastically supporting a disc, and a shoulder formed at one side of the elastic member for rotatably positioning and separating the disc in/from a receiving space of a drive.

In a disc protection casing and a drive for receiving the same according to the present invention, a disc protection casing for a single sided disc and a disc holder are inserted in a certain direction, and a double sided disc is inserted into a disc protection casing in a certain direction, so that it is possible to prevent an erroneous insertion of the disc.

To achieve the above objects, there is further provided a drive according to the present invention which includes a receiving portion including a disc protection casing having a disc receiving space therein, and a disc holder receivable in the disc protection casing body and having one end engaged with an elastic member for supporting a disc, and a recording and reproducing unit for recording and reproducing data on/from a disc received in the interior of the disc protection casing.

Additional advantages, objects and features of the invention will become more apparent from the description which follows.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein:

FIG. 1 is a view illustrating a conventional detachable disc cartridge;

FIG. 2 is an exploded plan view illustrating the structure of a cartridge body and a disc holder according to a first embodiment of the present invention;

FIG. 3 is a plan view illustrating a state that a disc is inserted in a disc holder as shown in FIG. 2;

FIG. 4 is a plan view illustrating a state before a disc holder of FIG. 2 is inserted into a cartridge body;

FIG. 5 is a plan view illustrating a state after a disc holder of FIG. 2 is inserted into a cartridge body;

FIG. 6 is a cross-sectional view taken along line VI—VI of FIG. 5;

FIG. 7 is a perspective view illustrating an insertion relationship between an adapter and a disc holder according to a first embodiment of the present invention;

FIG. 8 is a plan view illustrating the structures of a disc cartridge according to a second embodiment of the present invention and a holder insertable into the disc cartridge;

FIG. 9 is a partial perspective view illustrating a disc cartridge according to a third embodiment of the present invention and a holder insertable in the disc cartridge;

FIG. 10 is a partial perspective view illustrating a disc cartridge according to a fourth embodiment of the present invention and a holder insertable in the disc cartridge; and

FIG. 11 is a schematic block diagram illustrating an optical disc recording and reproducing unit according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The disc protection casing and a drive for receiving the same according to the present invention will be explained with reference to the accompanying drawings.

As shown in FIG. 2, a disc cartridge according to the present invention includes a cartridge body 12 having a disc receiving space formed therein and slanted surfaces 12 a which operate as guide members formed at an outer portion of the receiving space, and a disc holder 14 having semi-circular tension arms 18 which operate as elastic members for elastically supporting the disc 1.

A receiving port 15 is formed in an outer edge of the cartridge body 12, and a disc 1 inserted therethrough into the disc holder 14 is received into the interior of the cartridge body 12 via the receiving port 15.

The slanted surfaces 12 a are integrally formed with the cartridge body 12 in a rib shape when injection-molding the cartridge body 12. These slanted surfaces 12 a contact with the tension arms 18 when the disc holder 14 holding the disc 1 is received into the cartridge body 12, so that the tension arms 18 are pushed toward the respective lateral walls of the cartridge body 12 for thereby releasing a restricting force of the tension arms 18 with respect to the disc 1.

In addition, when the disc holder 14 is separated from the cartridge body 12, the tension arms 18 provide a certain elastic force to the disc 1 in a radial direction of the disc 1, so that the disc 1 is not separated from the disc holder 14.

In order to release the restriction force on the disc 1 and support the disc 1, shoulders 18 a which are engaged to the slanted surfaces 12 a are integrally formed at respective outer portions of the tension arms 18 being integral with the disc holder 14 when injection-molding the disc holder 14, and holder portion 16 is formed at an outer edge portion of the disc holder 14 for holding the disc holder 14.

As shown in FIG. 3, the tension arms 18 elastically support the disc 1 using a certain radial force applied toward the center portion of the disc 1, so that the disc 1 is stably supported by the holding portion 16 and the tension arms 18.

The process by which the disc 1 is inserted into the cartridge body 12 will now be explained in detail.

As shown in FIG. 2, a disc 1 is first inserted by a user into the disc holder 14 through an opening formed between the outer end portions of the tension arms 18 in the direction of arrow. As the disc 1 is inserted, the tension arms 18 are spread outwardly and upon completion of the inserting operation, the tension arms 18 elastically hold the disc 1 against the holding portion 16.

At this state as shown in FIG. 3, the user holds the holding portion 16 of the disc holder 14 and pushes the disc holder 14 into the cartridge body 12 via the receiving port 15.

Upon inserting the disc holder 14 into the cartridge body 12, the shoulders 18 a formed at the tension arms 18 contact with the slanted surfaces 12 a of the cartridge body 12 before the disc holder 14 is inserted fully.

Namely, the shoulders 18 a are moved toward the respective walls of the cartridge body 12 along the slanted surfaces 12 a from the state of FIG. 4 to the state of FIG. 5, so that an elastic supporting force of the tension arms 18 with respect to the disc 1 is released.

The disc 1 is rotatably positioned in the cartridge body 12, so that a spindle motor(not shown) can rotate the disc 1, and the optical pick-up unit(not shown) can access the recording surface of the disc 1.

The converse operation by which the disc holder 14 is separated from the cartridge body 12 in order to remove the disc 1 from the cartridge body 12 will next be explained.

When separating the disc holder 14 from the cartridge body 12, the restriction force exerted by the slanted surfaces 12 a to the shoulders 18 a is released, so that the tension arms 18 support the disc 1 by an elastic recovering force of the tension arms 18.

At this time, since a concave slanted surface 18 b is formed in end portion of each tension arm 18, even when the disc 1 is moved up and down in the cartridge body 12, the disc 1 is stably guided to the center portion of the tension arms 18 a, so that the tension arms 18 stably support the disc 1.

In the present invention, since the tension arms 18 which elastically support the disc 1 need have only a certain thickness compared to the height of the edge of the disc 1, the thickness of the disc holder 14 can be made small.

As shown in FIG. 7, in order to record and reproduce a small size recording medium(for example, when the diameter of the disc is 80 mm) using a disc driving apparatus which is capable of recording or reproducing a large size recording medium(for example, when the diameter of the disc is 120 mm), a slanted surface(not shown) which has the above-described function may be formed in the interior of an adapter 140 having an outer size which is the same as the cartridge body of the large size recording medium for the reason that a certain compatibility with respect to other apparatuses is obtained because almost all driving apparatuses are recently designed to drive a large size recording medium.

In this case, the user can detachably mount the disc holder 14 with the disc 1 therein at the receiving port 141 of the adapter 140.

In the drawings, reference numeral “l” designated a length difference between the large size recording medium and the small size recording medium. The end portion 14 a of the disc holder 14 is moved up to the center end portion 140 a of the adapter 140 when inserting the disc holder 14 into the adapter 140 for thereby obtaining a certain size opening.

The disc cartridge according to a second embodiment of the present invention includes a certain structure so that the cartridge body and the disc holder can be inserted only in a certain orientation.

As shown in FIG. 8, a groove 22 a which is formed eccentrically in a leftward or rightward direction is formed in the cartridge body 22, and a protrusion 26 a is formed on the disc holder 24 to be matingly insertable into the groove 22 a.

The protrusion 26 a is formed on the holding portion 26 and is eccentrically formed leftwardly or rightwardly to be opposite to the groove 22 a.

Therefore, since the groove 22 a and the protrusion are engagable only in a certain opposed orientation, the disc holder 24 is received in the cartridge body 22 only in a certain orientation.

Namely, the disc holder 24 is not received in the cartridge body 22 in a state that the groove 22 a does not correspond to the protrusion 26 a.

A guide message 24 a is written on the upper surface of the disc holder 24 for guiding an insertion direction when the disc 1 is inserted into the cartridge body 22.

As the guide message, there are “Recordable side of disc” or “Label side of disc” in accordance with the data recording surface or label surface of the disc 1, so that a user can recognize the insertion direction of the disc 1.

Therefore, the user can insert the disc holder into the cartridge body 22 in a certain orientation based on an asymmetrical shape of the cartridge body 22 and the disc holder 24, and the insertion direction of the disc 1 is coincided with the insertion direction of the cartridge body 22 and the disc holder 24 based on the guide message 24 a.

As shown in FIG. 9, the disc cartridge according to a third embodiment of the present invention includes a cartridge body 32 having an asymmetrically shaped receiving port 33, and a disc holder 34 having an asymmetrically shaped end portion corresponding to the receiving port 33.

In the embodiment of FIG. 9, the width W_(L) between the receiving port 33 and the left edge portion of the disc holder 34 received in the receiving port 33 is wider than the width W_(R) of the right edge portion.

Namely, if the shape of the disc holder 34 received in the cartridge body 32 is not coincided with the shape of the receiving port 33 of the cartridge body 32, the disc holder 34 is not received thereinto, so that a certain insertion orientation is implemented.

A guide message 34 a is formed on the upper surface of the disc holder 34 as shown in FIG. 9 to inform the user of the insertion orientation of the disc 1 in the same manner as in the embodiment of FIG. 8.

FIG. 10 is a perspective view illustrating a disc cartridge according to a fourth embodiment of the present invention.

As shown therein, the disc cartridge according to the fourth embodiment of the present invention includes a cartridge body 42 in which a rail 43 a is protruded from a lateral wall of a receiving port 43, and a disc holder 44 having a groove 44 a which is opposite to the rail 43 a.

In the embodiment of FIG. 10, the rail 43 a is formed only at a left lateral wall of the receiving port 43 and has a certain height, and a rail is not formed at the right lateral wall.

Namely, when the disc holder 44 is inserted into the cartridge body 42, if the groove 44 a in the disc holder 44 and the rail 43 a of the cartridge body 42 are not correspondingly engaged with each other, the disc holder 44 is not received into the cartridge body 42. Therefore, the disc holder 44 is received only in a certain orientation.

A guide message 44 b is formed on the upper surface of the disc holder 44 of the fourth embodiment of the present invention to inform the user of the insertion orientation of the disc 1 in the same manner as in the embodiments of FIGS. 8 and 9.

In the adapter 140 of FIG. 7 which is used for recording and reproducing a double sided or single sided recording medium using a disc driving apparatus capable of recording or reproducing a large sized recording medium, the receiving port 141 of the adapter 140 and the disc holder 14 received in the receiving port 141 are asymmetrically formed, so that the disc holder 14 is received into the adapter 140 only in a certain orientation.

In this case, a guide message may be printed on a certain portion of the adapter 140 to inform the user of the insertion orientation of a small sized recording medium.

As shown in FIG. 11, the disc recording and reproducing unit 50 which drives the disc 1 includes an optical pick-up unit 51 recording and reproducing data on/from the disc 1, an optical pick-up unit transport unit 51 transporting the optical pick-up unit 51, a data processing unit 52 processing the data inputted and transferring the processed data to the optical pick-up unit 51, an interface unit 53, and a controller 55 controlling the operations of the above-described elements. The interface unit 53 of the optical disc recording apparatus is connected with a host 56, so that certain instructions and data 57 are communicated therebetween.

As described above, the disc protection casing and a drive for receiving the same according to the present invention are capable of preventing a data recording surface of a disc from being contaminated when inserting and removng the disc.

In the present invention, since the disc is inserted in the disc holder, a user is able to easily insert a disc into a cartridge and remove the disc from the cartridge.

In the single sides disc cartridge according to the present invention, since the cartridge body and the disc holder are asymmetrically formed, a certain insertion orientation is implemented for thereby preventing an erroneous operation of the apparatus.

In the present invention, since there is provided a guide message for informing a user of the insertion orientation of the disc, it is possible to prevent an erroneous insertion of the disc holder into the cartridge body.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as recited in the accompanying claims. 

What is claimed is:
 1. A disc cartridge comprising: a cartridge body having an upper casing and a lower casing attached together at a front edge, a rear edge, and side edges thereof, the front edge having a receiving port formed thereof, and the upper and/or lower casing having a rib-shaped guide member formed at an inner surface thereof to define a rear periphery of a disc-receiving space; and a disc holder having a holding portion and a pair of tension arms extending from the holding portion for grasping a disc therebetween, each tension arm having an outer branch and an inner branch, the outer branches extending perpendicularly from the holding portion, and each outer branch having a shoulder at an end thereof for contacting and engaging the rib-shaped guide member in the cartridge body to be guided therealong to allow the tension arms to release or grasp the disc when the disc holder is inserted into or removed from the cartridge body, the inner branches being arcuate for grasping or releasing peripheral edges of the disc therebetween, the inner branches encircling the edges of the disc for defining a front and side periphery of the disc-receiving space when the inner branches release the disc into the disc-receiving space upon complete insertion of the disc holder into the cartridge body.
 2. The cartridge of claim 1, wherein the rib-shaped guide member has wedge-shaped portions that respectively contact and engage with the shoulder of each outer branch of the tension arms.
 3. The cartridge of claim 2, wherein the outer branch and the inner branch of at least one of the tension arms are different in length, and form a relief therebetween.
 4. The cartridge of claim 3, wherein the wedge-shaped portions of the rib-shaped guide member operatively engage with the relief such that the outer branch and inner branch are supported by the rib-shaped guide member when the disc holder is completely inserted into the cartridge body.
 5. The cartridge of claim 1, wherein the outer branch has a length defined by a distance from the holding portion to an end portion thereof, and the inner branch has a length defined by a distance from the holding portion to an end portion thereof, the length of the outer branch being less than the length of the inner branch.
 6. The cartridge of claim 1, wherein the outer branch extends from the holding portion less than the inner branch.
 7. The cartridge of claim 1, wherein the inner branch of each tension arm has a groove formed thereon for receiving a periphery of the disc.
 8. The cartridge of claim 1, wherein the disc holder further includes: a locking means formed adjacent to the holding portion for cooperating with an inner surface of the cartridge body to allow the disc holder to operatively engage and disengage with the cartridge body.
 9. A disc drive comprising: a receiving portion for receiving a cartridge body and a disc holder insertable into the cartridge body, the cartridge body having a receiving space therein, a receiving port formed at an outer edge thereof, and a rib acting as a guide member formed at an outer periphery of the receiving space, and the disc holder having a pair of semi-circular tension arms for grasping a disc therebetween, each tension arm having a shoulder being integrally formed at an outer lateral portion of the tension arm and extended outwardly therefrom for contacting and engaging the rib in the cartridge body as the disc holder is inserted into the cartridge body; and a recording and reproducing unit operatively connected with the receiving port for recording data onto and reproducing data from the disc released by the disc holder, whereby, as the disc holder is inserted into the cartridge body, the shoulders are guided along the rib outwardly toward respective lateral walls of the cartridge body so that the tension arms integrally formed with the shoulders are pushed outwardly toward the respective lateral walls of the cartridge body for thereby releasing the disc grasped therebetween, and wherein the disc holder has a holding portion that engages with the receiving port, and each tension arm has an outer branch and an inner branch, the outer branches extending perpendicularly from the holding portion, and each outer branch having the shoulder formed at an end thereof for contacting and engaging the rib in the cartridge body to be guided therealong to allow the tension arms to release or grasp the disc when the disc holder is inserted into or removed from the cartridge body, and the inner branches being arcuate for grasping or releasing peripheral edges of the disc therebetween.
 10. The disc drive of claim 9, wherein the rib is inclined to act as a linear cam for guiding the shoulders formed integrally at the outer lateral portions of the tension arms when the disc holder is inserted into the cartridge body.
 11. The disc drive of claim 9, wherein the rib has wedge-shaped portions that respectively contact and engage with the shoulder of each tension arm. 